Fenix LR35R Rechargeable Flashlight – 10000 Lumens

Max Lumens: 10000
Modes: 6
Battery: 21700
(85 customer reviews)


The LR35R is an extremely powerful flashlight that is capable of blasting an incredible 10000 lumens of light from a flashlight that is only 5.5” long. Powered by two 21700 rechargeable li-ion batteries, the LR35R is USB Type-C rechargeable and includes a battery level indicator to keep track of your batteries status. Intelligent step-down overheat protection helps keep the light from overheating while using the maximum outputs. The LR35R 10000 lumen flashlight is IP68 dustproof and waterproof. Perfect for outdoorsmen, or for anybody who wants to dramatically light up the night, the LR35R defines what is possible from a mid-sized flashlight! Please note this light requires a wall charger that it at least 2 AMPS for proper charging.

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Max Lumens: 10000
Modes: 6


Fenix LR35R flashlight spec chart

LR35R Size:

Length: 5.5” (140mm)
Head: 2.0” (51.5mm)
Height: 1.8” (46.5mm)

LR35R Weight:

8.4 oz. (239g) excluding batteries

LR35R Battery:

Two included 21700 rechargeable li-ion batteries


Two ARB-L21-4000P rechargeable li-ion batteries, Type-C charging cable, holster, lanyard, spare O-ring


Limited Lifetime Guarantee from Fenix Lighting USA

Additional Features of the LR35R 10000 Lumen Flashlight

  • 6 Luminus SST40 LED’s with a lifespan of 50,000 hours.
  • 10,000 lumens maximum output; 500 meters maximum beam distance.
  • Included 2 x 21700 rechargeable Li-ion power batteries.
  • USB Type-C charging port.
  • Battery level indication for instant checking of remaining battery level.
  • Lockout function avoids accidental activation.
  • Intelligent overheat protection against high surface temperature.
  • Intelligent memory circuit recalls the last used brightness level.
  • Premium type HAIII hard-anodized anti-abrasive finish.

Operating Instructions of the LR35R 10000 Lumen Flashlight


With the light unlocked and switched off, press and hold the switch for 0.5 seconds to turn on the light.
With the light switched on, press and hold the switch for 0.5 seconds to turn off the light.

Output Selection for 10000 Lumen Flashlight

In general mode, single click the switch to cycle through Eco→Low→Med→High→Turbo.

Mode Switching

In general mode, press and hold the switch for 1.2 seconds to enter strobe; single click the switch again to turn back to the last used output in general mode.


Lock: with the light unlocked and switched off, double click the switch to lock the light, the light will blink twice on Eco to indicate locked status.
Unlock: with the light locked and switched off, double click the switch, the light will be unlocked and activated on Eco.
In locked status, clicking or pressing the switch will activate 2 one-second blinks on Eco to indicate locked status.

Battery Specifications

Type Dimensions Nominal Voltage
Rechargeable Li-ion battery 21700* 3.6V

* Note: It is recommended to use Li-ion power battery, or the 10,000 lumens maximum output may not be reached.
** 21700 Li-ion batteries are powerful cells designed for commercial applications and must be treated with caution and handled with care. Only use quality batteries with circuit protection will reduce the potential for combustion or explosion; but cell damage or short circuiting are potential risks the user assumes.

Battery Replacement

Unscrew the tail cap to insert the battery with the anode side (+) towards the light head, then screw the tail cap back on.

Intelligent Memory Circuit

The light memorizes the last selected output of general mode. When turned on again the previously used output of general mode will be recalled.

Intelligent Overheat Protection

The light will accumulate a lot of heat when used on Med, High, Turbo output level for extended periods. When the light reaches a temperature of 65°C or above, the light will automatically step down a few lumens to reduce the temperature. When the temperature drops below 65°C, it will then allow the user to reselect Med, High, Turbo mode.

Low Voltage Warning

When the voltage level drops below the preset level, the flashlight is programmed to downshift to a lower brightness level until Eco output is reached. When this happens in Eco output, the battery level indicator blinks to remind you to recharge or replace the battery.

Battery Level Indication

With the light switched off, single click the switch to check the battery status, the indicator will last for 3seconds.

  • Green light on: saturated 100% – 85%
  • Green light flashes: sufficient 85% – 50%
  • Red light on: poor 50% – 25%
  • Red light flashes: critical 25% – 1%

Note: The indicator will display for 3 seconds each time the general mode is switched on.

Charging Your 10000 Lumen Flashlight

  1. First switch off the light and plug the USB A socket of the charging cable into an electrical outlet, then connect the USB Type-C socket of the charging cable to the light.
  2. The indicator will display red while charging, and will turn to green when fully charged.
  3. Once charging is completed, be sure to close the anti-dust cover.


  1. Only Eco output level is available when charging.
  2. The normal charging time is approximately 3 hours and 30 minutes from depletion to full charging.
  3. Recharge a stored light every four months to maintain optimum performance of the battery.

Usage and Maintenance

  • Disassembling the sealed head can cause damage to the light and will void the warranty.
  • Fenix recommends using an excellent quality batteries.
  • If the light will not be used for an extended period, remove the batteries, or the light could be damaged by electrolyte leakage or battery explosion.
  • Lock the light or remove the batteries to prevent accidental activation during storage or transportation.
  • Long-term use can result in O-ring wear. To maintain a proper water seal, replace the ring with an approved spare.
  • Periodic cleaning of the battery contacts improves the lamp’s performance as dirty contacts may cause the lamp to flicker, shine intermittently or even fail to illuminate for the following reasons:
    A: The battery needs replacing.
    Solution: Replace battery pack /batteries (Ensure batteries are inserted according to the manufacturer’s specifications).
    B: The threads, PCB board contact or other contacts are dirty.
    Solution: Clean the contact points with a cotton swab soaked in rubbing alcohol.

If the above methods don’t work, please contact your authorized distributor.

Warnings for This 10000 Lumen Flashlight

  • This flashlight is a high-intensity lighting device capable of causing eye damage to the user or others. Avoid shining the flashlight directly into anyone’s eyes.
  • This flashlight will accumulate a lot of heat when used for extended periods, resulting in high temperature of the flashlight shell. Pay attention to avoid scalding.
  • All information provided in this manual is subject to change without prior notice.

85 reviews for Fenix LR35R Rechargeable Flashlight – 10000 Lumens

Based on 85 reviews

Customer Images

Image #1 from Elliott Tran
Image #2 from Enrique
Image #3 from Reuben S.
Image #4 from Justin
Image #1 from Elliott Tran

Elliott Tran

The need for better UI is real for light this bright and hot. In order to go to lower level of brightness, one would have to cycle through all levels before coming back down. Light is so bright that it can be blinding and hot. I thought of a solution by pointing it toward my body while cycling through the levels, but it ended up burning my favorite jacket within seconds as can be seen in the attached image. One other issue is it is too easy to unlock with double clicking. I was lucky this time that the flash light didn’t burn down my backpack or the house. After carefully locking the flashlight and put it in my stuffed backpack, I smelled something burning and found the source was from my backpack. As I opened it, the flashlight was on strobe mode. I have experience this same thing with the Fenix keychain light. I often find it on when taken out of my pocket, even though I always make a conscious effort to lock it. With all the choices of flashlight these days, I think Fenix should seriously rethink the UI before they are left in the dust.

(5) (2)
Image #2 from Enrique


This light is one of my favorites. Love that you can carry the power of the sun in hand at a moments notice. 10,000 lumens people! I use this light at work as I work graveyard shift as a lineman. It is one of my most go to tools. Love the user interface and the strobe feature comes in handy with the alternating pattern on the strobe. Does get hot on Turbo, but it’s not meant to run on turbo full time. I run it at the level 4. Those luminous SST-40’s are no joke. I daily carry this light in my front pocket. No joke, it works fine. Ergonomically the light is awesome and just the right amount of purchase for a good grip. Love the recessed on/off button as this thing has not turned on accidentally in my pocket. Fenix this is a tried and true design. Love the Dual 21700’s as well. Thanks again!

(6) (1)
Image #3 from Reuben S.

Reuben S.

What a powerhouse! I was in love with my TK35 and thought it was the greatest thing ever, then the TK35UE came along, and that was the greatest ever. I've tried many other flashlights, but I've always appreciated the dual-battery, compact size of the TK35. Now the LR35R comes along with a much more powerful output in a significantly smaller package, and we have a winner. The USB-C external charging port is great, I love that I don't have to take the flashlight apart and remove the batteries to charge them. The power button is located on the side of the unit, which is not my preference. It's much faster and more intuitive to be able to find an on/off button that located on the tailpiece, so I'm a bit disappointed in that. Like all Fenix flashlights, it's built like a tank. It’s significantly shorter than the TK35, which is convenient. It looks like this was achieved by putting a bunch of LEDs at the front of the lens with very small reflectors instead of having a single LED with a huge recessed reflector. This makes for a wide, even light. And of course, at 10,000 lumens, this light is insanely bright. I’ve included comparison images between the LR35R, TK35UE (3200 lumens), and the TK35 (860 lumens) below. All of the flashlights are set to full brightness. It’s pretty insane. The downside is that it gets hot quite quickly.

(16) (1)
Image #4 from Justin


I have the bigger brother (LR40R) flashlight from Fenix. The new LR35R is almost just as bright but makes up for it in size. I can carry the new LR35R in my pocket, although I am 6'3, 245 lbs. Your mileage may vary depending on your size. It conceals pretty good in the front pocket of my 5.11 jeans. A few things I like about it; brightness/size, weight, modes, button position, tail stand, easy to charge, pocket clip, etc. Not really any knocks but if you told me I had to list one, I'd do without the charge port cover as they tend to get stretched over time when using it over and over to charge the battery. It's still waterproof without the cover but I'd rather just remove the batteries and charge them in a standalone charger. But, that's me. Everyone has their own preferences. I will say, I would like to see Fenix use the external charging system like they use on the E18R. No ports, just a magnetic charge cable. Some intended uses I plan for it are for camping, hiking, and general use around the house. The battery lasts a very long time on the first couple of modes. Highly recommended.

(8) (0)
Image #1 from Elliott Tran
Image #2 from Enrique
Image #3 from Reuben S.
Image #4 from Justin
  1. Russell (verified owner)

    Extremely bright – WOW and easy to use

    (0) (0)
  2. Troy B. (verified owner)

    Amazing light. Like the sun coming up. Unbelievable.

    (0) (0)
  3. Darren Davis (verified owner)

    The flashlight is super bright, and that is very nice. However, the button that turns it on and switches between modes is very unresponsive. Sometimes I end up pushing the button more than ten to fifteen times just to get it to turn on, turn off, or switch between modes. Also, for some reason it is very touchy between medium and high mode. It occasionally skips straight to high from low.

    (0) (0)
    • Dianne (store manager)

      I have asked warranty to contact you.

  4. Eric (verified owner)

    This light is indeed ridiculously bright. It comes with a warning label that it can cause eye damage. I believe it. Even the reflected light is dazzling. My one knock on this is that the switch operation makes it a little confusing and difficult to use. Between holding the switch down for a half-second to turn on/off, and the lightest possible touch switching to the next highest light level, and then the lock/unlock is a double-tap, I find that I often can’t easily predict what will happen next when I do something. It’s not exactly intuitive. An on/off tailswitch would be a big improvement.

    (1) (0)
  5. Andrew B. (verified owner)

    If you’re looking for a compact , rechargeable bright as daylight light this is it! You’ll be happy, awesome light!

    (0) (0)
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